Torque converter lock up issues
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5th Wheeling
Joined: Jan 2020
Posts: 37
Likes: 0
Torque converter lock up issues
Need some help truck is a 17 f250 are these trucks knowing for having the torque converter lock up really hard under light acceleration.. I’m deleted and tuned worked with tuner tried several different tunes. And returned back to stock and really no difference.tried kam reset and drive truck easy then it goes back to doing it again. If I’m hard on acceleration or pushing on it and seems to lock up fine and about 90% of the time it locks up smoothly under light acceleration only does it in 4th n 5th gear speed depending. Wondering what I can try next.. torque converter solenoid do something like this? Or shift solenoid? Wondering if anyone else has had similar problem and how they fixed it thanks
Fleet Mechanic
Joined: Mar 2006
Posts: 1,519
Likes: 134
Need some help truck is a 17 f250 are these trucks knowing for having the torque converter lock up really hard under light acceleration.. I’m deleted and tuned worked with tuner tried several different tunes. And returned back to stock and really no difference.tried kam reset and drive truck easy then it goes back to doing it again. If I’m hard on acceleration or pushing on it and seems to lock up fine and about 90% of the time it locks up smoothly under light acceleration only does it in 4th n 5th gear speed depending. Wondering what I can try next.. torque converter solenoid do something like this? Or shift solenoid? Wondering if anyone else has had similar problem and how they fixed it thanks
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5th Wheeling
Joined: Jan 2020
Posts: 37
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I never noticed it before so I would have to say yes but I returned it back to stock and still does it. Only under light acceleration. Could it be torque doesn’t shake under hard load holds good I was hoping maby it would be a bad solenoid
Cargo Master
Joined: Oct 2019
Posts: 2,836
Likes: 1,191
From: Southeast MO
On my Ram, even with the tuner on "stock" it still has their programming in it. I'd say it's safe to say it is due to the tune. Same on my Excursion, a stick tune was still like a 20hp tune with transmission programming.
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5th Wheeling
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So what do you recommend I try ?? Go into tuner and return back to stock
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Cargo Master
Joined: Oct 2019
Posts: 2,836
Likes: 1,191
From: Southeast MO
To be honest I'm not sure. Why did you delete in the first place? It's hard to diagnose issues once you introduce aftermarket tuning. There's no cheap way really, either try a different tuner or return the truck to stock and have the dealer flash the stock programming back.
Cargo Master
Joined: Oct 2019
Posts: 2,836
Likes: 1,191
From: Southeast MO
Maybe someone can chime in with a suggestion for better tunes. It took me 3 tries on my Excursion to find tunes that I liked. On my Ram I had H&S but it seemed like they screwed up the transmission tuning on every other update they released. I'm done with deleting and tuning, just my opinion.
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
When you tune you have to go through transmission relearn process. It takes a while, baby it and it will be lame. Do you have any transmission codes? Try retuning back to stock, allow it to relearn for a while, then check codes, then if still good, tune, relearn, check codes.
5th Wheeling
Joined: Jul 2018
Posts: 32
Likes: 0
I have not tried returning to stock I am using proven tunes with the sct. I also did get the forscan and did a kam reset and I did baby it the first 1500 miles not over 30 percent throttle and it's like they can't get the lock up at the right time for low throttle. What tunes do you recommend that are good.